Self-Hosted Alternatives to Popular Services

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The original was posted on /r/selfhosted by /u/Good-Spirit-pl-it on 2023-07-04 08:10:11+00:00.

In my institution's department we have several email accounts hosted by institution's headquarter. All my coworkers complain about limited space and some others things. I wonder if there is some easy way to sync those accounts to some local server and then make all coworkers work with locally storaged mails.

Probably need sync accounts through POP3, and then serve it to clients through IMAP or setup some webmail client. SMTP probably is no needed, because can use headquarter's server.

Obviously this solution will need local backups...

What you think about that solution? Any pro and cons?